A337476 Position of the first occurrence of n in A337474.

1, 3, 11, 23, 61, 127, 199, 331, 467, 673, 929, 1181, 1493, 1861, 2243, 2693, 3221, 3739, 4327, 4993, 5689, 6421, 7283, 8191, 9137, 10111, 11161, 12281, 13451, 14747, 16067, 17569, 19037, 20509, 22051, 23687, 25411, 27179, 29023, 31019, 32971, 34963, 37097, 39371, 41651, 44021, 46559, 49169, 51719

Offset: 0

Author

Antti Karttunen, Aug 28 2020

Keywords

• nonn

Links

• Index entries for sequences computed from indices in prime factorization
• Index entries for sequences related to primorial numbers
• Index entries for sequences related to sigma(n)

Crossrefs

Cf. A000040, A107705, A108227, A337474, A337478.

Cf. also A337477.

Formula

For all n >= 0, A337474(a(n)) = n.

For all n >= 1, a(n) = A000040(A107705(n)). [Conjectured, see comment in A108227]

For all n >= 0, a(n) <= A337478(n).