VOOZH about

URL: https://oeis.org/A176671

⇱ A176671 - OEIS

login
A176671
Primes not of the form p + 2^k*k^2 for p prime and k > 0.
0
2, 3, 11, 17, 37, 41, 67, 71, 97, 107, 127, 137, 149, 157, 163, 191, 233, 277, 281, 307, 331, 337, 367, 373, 397, 401, 443, 457, 487, 499, 509, 541, 547, 577, 599, 607, 631, 683, 701, 709, 727, 739, 751, 757, 761, 769, 787, 809, 821, 877, 919, 941, 971, 977
OFFSET
1,1
MAPLE
A007758 := proc(n) 2^n*n^2 ; end proc: isA176671 := proc(n) if isprime(n) then for i from 1 do a58 := A007758(i) ; if a58 >n then return true; elif isprime( n-a58) then return false; end if ; end do: else true; end if; end proc: for n from 1 to 200 do p := ithprime(n) ; if isA176671(p) then printf("%d, ", p) ; end if; end do: # R. J. Mathar, Apr 26 2010
CROSSREFS
Cf. A007758.
Sequence in context: A250175 A038907 A019417 * A191085 A024859 A023870
KEYWORD
nonn
AUTHOR
EXTENSIONS
Corrected (37 inserted, 853 removed, 907 removed) by R. J. Mathar, Apr 26 2010
STATUS
approved