A347394 Positions of 4's in A347381.

21, 26, 30, 32, 33, 36, 37, 40, 42, 44, 48, 49, 50, 54, 60, 65, 75, 80, 84, 90, 91, 112, 120, 125, 126, 153, 162, 175, 176, 198, 208, 220, 231, 252, 272, 275, 304, 325, 343, 368, 400, 425, 475, 546, 575, 725, 765, 775, 11132, 12750, 13167, 31262, 46893, 55660, 63825, 78155, 93500, 171171, 191301, 406406, 483771, 609609

Offset

1,1

Comments

Question: Why the sudden rarification of terms after a(48) = 775?

Links

Table of n, a(n) for n=1..62.

Index entries for sequences computed from indices in prime factorization

Index entries for sequences related to sigma(n)

Crossrefs

Cf. A347381.

Cf. also A336702, A347391, A347392, A347393.

Sequence in context: A219393 A020269 A031170 * A035700 A134935 A344978

Adjacent sequences: A347391 A347392 A347393 * A347395 A347396 A347397

Keyword

nonn

Author

Antti Karttunen, Aug 31 2021

Status

approved