A278064 Relative of Hofstadter Q-sequence: a(n) = n for 1 <= n <= 12; a(n) = a(n-a(n-1)) + a(n-a(n-2)) for n > 12.

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 3, 13, 14, 5, 15, 6, 7, 16, 18, 10, 8, 18, 22, 12, 19, 14, 24, 11, 23, 27, 16, 13, 17, 15, 26, 20, 10, 27, 36, 20, 15, 42, 14, 31, 21, 34, 28, 15, 23, 50, 14, 31, 54, 24, 19, 23, 42, 32, 31, 34, 51, 14, 36, 61, 29, 17, 77

Offset

1,2

Comments

Similar to Hofstadter's Q-sequence A005185 but with different starting values.

This sequence has exactly 69 terms, since a(69)=77 and computing a(70) would refer to a(-7).

Links

Nathan Fox, Table of n, a(n) for n = 1..69

N. Fox, Hofstadter-like Sequences over Nonstandard Integers, Talk given at the Rutgers Experimental Mathematics Seminar, November 10 2016.

Crossrefs

Cf. A005185, A278056, A278057, A278058, A278059, A278060, A278061, A278062, A278063, A278065.

Sequence in context: A106614 A297242 A043272 * A333358 A305795 A319705

Adjacent sequences: A278061 A278062 A278063 * A278065 A278066 A278067

Keyword

nonn,fini,full

Author

Nathan Fox, Nov 10 2016

Status

approved