Voozh

A059627

Generalized nim sum n + n + n + n in base 10; carryless multiplication 4 X n base 10.

0, 4, 8, 2, 6, 0, 4, 8, 2, 6, 40, 44, 48, 42, 46, 40, 44, 48, 42, 46, 80, 84, 88, 82, 86, 80, 84, 88, 82, 86, 20, 24, 28, 22, 26, 20, 24, 28, 22, 26, 60, 64, 68, 62, 66, 60, 64, 68, 62, 66, 0, 4, 8, 2, 6, 0, 4, 8, 2, 6, 40, 44, 48, 42, 46, 40, 44, 48, 42, 46, 80, 84, 88, 82, 86

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OFFSET

0,2

LINKS

Chris R. Rehmann, Table of n, a(n) for n = 0..10000

David Applegate, Marc LeBrun and N. J. A. Sloane, Carryless Arithmetic (I): The Mod 10 Version.

PROG

(MATLAB) a = @(n) polyval(mod(4*(num2str(n)-'0'), 10), 10); % Chris R. Rehmann, Oct 06 2025

CROSSREFS

Cf. A001477 for carryless 1 X n, A004520 for carryless 2 X n base 10, A059626 for carryless 3 X n base 10, A008592 for carryless 10 X n.

Sequence in context: A366018 A019954 A072616 * A200603 A159591 A270857

Adjacent sequences: A059624 A059625 A059626 * A059628 A059629 A059630