A077016 a(1) = 1, a(2) = 4, continue by dividing by the smallest prime not used earlier and multiplying with the smallest composite number just greater than the previous prime used in the division and then take the integer part at every step.

1, 4, 2, 12, 4, 32, 6, 54, 7, 70, 6, 72, 5, 70, 4, 72, 3, 60, 2, 48, 1, 30, 0

Offset

1,2

Comments

a(n) = 0 for n>23. Sequence needs some refinement. Can some improvement be suggested so that no term is zero.

Links

Table of n, a(n) for n=1..23.

Example

a(3) = 4/2 = 2, a(4) = 2*6 = 12, a(5) = 12/3 = 4, a(6) = 4*8 = 32, a(7) = floor(32/5) = 6.

Crossrefs

Cf. A077015.

Sequence in context: A137447 A353749 A077015 * A191436 A260434 A243344

Adjacent sequences: A077013 A077014 A077015 * A077017 A077018 A077019

Keyword

fini,more,nonn

Author

Amarnath Murthy, Oct 28 2002

Status

approved