A112417 Sequence is generated as in A048985, but primes are instead written in decreasing order before being concatenated.

1, 2, 3, 10, 5, 14, 7, 42, 15, 22, 11, 58, 13, 30, 23, 170, 17, 62, 19, 90, 31, 46, 23, 234, 45, 54, 63, 122, 29, 94, 31, 682, 47, 70, 61, 250, 37, 78, 55, 362, 41, 126, 43, 186, 95, 94, 47, 938, 63, 182, 71, 218, 53, 254, 93, 490, 79, 118, 59, 378, 61, 126, 127, 2730

Offset

1,2

Links

Diana Mecum, Table of n, a(n) for n = 1..847

Example

12 = 3 * 2^2, with prime divisors written in descending order.
So we have 3 = 11 binary, 2 = 10 binary, 2 = 10 binary, which is (after concatenation) 111010. So a(12) is 111010 = 58 when converted from binary to decimal.

Crossrefs

Cf. A004676, A048985.

Sequence in context: A048985 A337183 A348058 * A139693 A182076 A347271

Adjacent sequences: A112414 A112415 A112416 * A112418 A112419 A112420

Keyword

base,nonn

Author

Leroy Quet, Dec 09 2005

Extensions

More terms from Diana L. Mecum, Jul 14 2007

Status

approved