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URL: https://oeis.org/A083070

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A083070

First superdiagonal of number array A083064.

3

1, 5, 43, 469, 6221, 98041, 1797559, 37665881, 888888889, 23343682141, 675462155171, 21356578028941, 732659790696133, 27107717023577009, 1076060070966390511, 45619867383437689201, 2057328526812890853617, 98342497503582839225461, 4966938947368421052631579

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OFFSET

1,2

LINKS

Table of n, a(n) for n=1..19.

FORMULA

a(n) = ((n-1)*(n+1)^n + 1)/n.

a(n) ~ exp(1-1/(2*n)) * n^n. - Amiram Eldar, Feb 06 2026

MATHEMATICA

a[n_] := ((n-1)*(n+1)^n + 1)/n; Array[a, 20] (* Amiram Eldar, Feb 06 2026 *)

CROSSREFS

Cf. A083064, A083069, A083071.

Sequence in context: A369023 A274666 A301976 * A191802 A092471 A093620

Adjacent sequences: A083067 A083068 A083069 * A083071 A083072 A083073

KEYWORD

easy,nonn

AUTHOR

Paul Barry, Apr 21 2003

STATUS

approved