cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A129629 Nonzero bisection of Moebius transform of A082392.

Original entry on oeis.org

1, 1, 3, 7, 14, 31, 63, 123, 255, 511, 1015, 2047, 4092, 8176, 16383, 32767, 65503, 131061, 262143, 524223, 1048575, 2097151, 4194162, 8388607, 16777208, 33554175, 67108863, 134217693, 268434943, 536870911, 1073741823
Offset: 1

Views

Author

Ralf Stephan, May 31 2007

Keywords

Comments

Possibly identical to A011947.

Programs

  • PARI
    A129629_upto(N=100)={ my( d=2*N+3, b=Vec( sum( k=0, exponent(d), (x^2^k)/(1-2*x^2^(k+1)),O(x^d)))); vector( N,i, sumdiv(i*2-1,k, moebius((i*2-1)/k)*b[k])) } \\  M. F. Hasler, May 03 2008, updated May 27 2025

Formula

a(n+1) = 2^n-A383182(n). - M. F. Hasler, May 03 2008; sequence number corrected by M. F. Hasler, May 27 2025