A308936 a(n) = a(n-a(n-1)) + a(n-a(n-2)) + a(n-a(n-3)), with a(n) = ceiling(4*n/5) for n <= 9.

1, 2, 3, 4, 4, 5, 6, 7, 8, 9, 9, 10, 11, 11, 12, 12, 13, 14, 15, 15, 16, 17, 18, 18, 19, 20, 21, 21, 22, 23, 24, 24, 25, 26, 26, 27, 27, 28, 29, 30, 30, 31, 32, 32, 33, 33, 34, 35, 35, 36, 36, 37, 38, 39, 39, 40, 41, 42, 42, 43, 44, 44, 45, 45, 46, 47, 48, 48, 49, 50, 51, 51, 52, 53, 53, 54, 54, 55, 56, 57, 57

Offset

1,2

Comments

Similar to A278055 but with different starting values.

Links

Robert Israel, Table of n, a(n) for n = 1..10000

Maple

a:= proc(n) option remember; procname(n-procname(n-1))+procname(n-procname(n-2))+procname(n-procname(n-3)) end proc:
for n from 1 to 9 do a(n):= ceil(4*n/5) od:
map(a, [$1..100]); # Robert Israel, Jul 28 2024

Prog

(PARI) q=vector(100); for(n=1, 9, q[n]=ceil(4*n/5)); for(n=10, #q, q[n]=q[n-q[n-1]]+q[n-q[n-2]]+q[n-q[n-3]]); q

Crossrefs

Cf. A278055.

Sequence in context: A366870 A171974 A232748 * A187737 A109401 A307294

Adjacent sequences: A308933 A308934 A308935 * A308937 A308938 A308939

Keyword

nonn

Author

Altug Alkan, Aug 02 2019

Status

approved