A010064 Base 4 self or Colombian numbers (not of form k + sum of base 4 digits of k).

1, 3, 8, 13, 18, 20, 25, 30, 35, 37, 42, 47, 52, 54, 59, 64, 73, 78, 83, 85, 90, 95, 100, 102, 107, 112, 117, 119, 124, 129, 138, 143, 148, 150, 155, 160, 165, 167, 172, 177, 182, 184, 189, 194, 203, 208, 213, 215, 220, 225, 230, 232, 237, 242, 247, 249, 254

Offset

1,2

References

Steven R. Finch, Mathematical Constants, Cambridge, 2003, Section 2.24, pp. 179-180.

József Sándor and Borislav Crstici, Handbook of Number theory II, Kluwer Academic Publishers, 2004, Chapter 4, pp. 384-386.

Links

Donovan Johnson, Table of n, a(n) for n = 1..10000

Index entries for Colombian or self numbers and related sequences

Mathematica

s[n_] := n + Plus @@ IntegerDigits[n, 4]; m = 250; Complement[Range[m], Array[s, m]] (* Amiram Eldar, Nov 28 2020 *)

Crossrefs

Cf. A003052, A010061, A010067, A010070, A230631-A230635.

Related base-4 sequences: A053737, A230631, A230632, A010064, A230633, A230634,A230635, A230636, A230637, A230638, A010065 (trajectory of 1)

Sequence in context: A081766 A152676 A197062 * A310304 A133330 A190505

Adjacent sequences: A010061 A010062 A010063 * A010065 A010066 A010067

Keyword

nonn,base

Author

Leonid Broukhis

Status

approved