A176676 Primes not of the form prime + k^2*2^(k-1).

2, 5, 7, 17, 23, 29, 71, 101, 113, 127, 179, 191, 197, 223, 239, 251, 257, 281, 283, 311, 331, 337, 359, 401, 449, 463, 491, 521, 541, 569, 587, 617, 647, 659, 673, 701, 733, 739, 743, 757, 761, 827, 853, 877, 881, 883, 907, 911, 929, 953, 997, 1051, 1063, 1093

Offset

1,1

Links

Table of n, a(n) for n=1..54.

Maple

From R. J. Mathar, Apr 27 2010: (Start)
A014477 := proc(n) (n+1)^2*2^n ; end proc:
isA176676 := proc(p) local n, a77 ; if not isprime(p) then return false; end if; for n from 1 do a77 := A014477(n-1) ; if isprime(p-a77) then return false; elif p-a77<2 then return true; end if; end do: end proc:
for n from 1 to 300 do p := ithprime(n) ; if isA176676(p) then printf("%d, ", p) ; end if; end do: (End)

Crossrefs

Cf. A014477.

Sequence in context: A110254 A019084 A278487 * A307452 A066028 A066039

Adjacent sequences: A176673 A176674 A176675 * A176677 A176678 A176679

Keyword

nonn

Author

Juri-Stepan Gerasimov, Apr 23 2010

Extensions

Corrected (149 replaced by 179, 269 removed, 643 removed, 743 and 911 and 1053 inserted) by R. J. Mathar, Apr 27 2010

Status

approved