A324812 Numbers k such that A156552(k) is a square.

1, 2, 5, 10, 11, 17, 23, 31, 41, 47, 50, 55, 59, 67, 73, 83, 97, 98, 103, 109, 127, 137, 149, 154, 157, 167, 179, 187, 191, 197, 211, 227, 233, 241, 257, 266, 269, 277, 283, 307, 313, 331, 347, 353, 367, 374, 379, 389, 391, 401, 419, 431, 439, 449, 461, 467, 487, 499, 509, 523, 547, 563, 571, 587, 598, 599, 605, 607, 617, 631

Offset: 1

Author

Antti Karttunen, Mar 16 2019

Keywords

• nonn

Comments

Sequence A005940(1+(n^2)), n >= 0, sorted into ascending order.

Links

• Antti Karttunen, Table of n, a(n) for n = 1..10000
• Index entries for sequences related to binary expansion of n
• Index entries for characteristic functions
• Index entries for sequences computed from indices in prime factorization

Crossrefs

Cf. A000290, A005940, A156552, A324822 (characteristic function).

Subsequence of A324813.

Programs

PARI

for(n=1,oo,if(A324822(n),print1(n,", ")));