login
A101511
The first 2 digits of the sequence form a prime number (23), the next 3 digits form a prime number (457), the next 4 also (8923), the next 5 also (24373), the next 7 also (8394151), the next 8 also (52535471), etc., with a(n) < a(n+1).
0
2, 3, 4, 5, 7, 8, 9, 23, 24, 37, 38, 39, 41, 51, 52, 53, 54, 71, 72, 73, 74, 75, 78, 91, 93, 97, 98, 111, 131, 132, 139, 149, 151, 154, 173, 174, 175, 178, 191, 193, 211, 213, 215, 217, 231, 232, 311, 312, 323
OFFSET
2,1
COMMENTS
Primes involved are 23, 457, 8923, 24373, 8394151, 52535471, 727374757, 89, 193, 97, 9811, 113, 1132139, 149, 15115417, 317, 417517819, 1193, 2, 11213, 2, 15217, 23, 12323, 113, 12323; the number of digits of each prime, here, give the digits of exactly the sequence above: 2 3 4 5 7 8 9 2 3 2 4 3 7 3 8 3 9 4 1 5 1 5 2 5 3 5 ... The first available primes were chosen and chunked so as to force [a(n+1) - a(n)] to be minimal.
CROSSREFS
Sequence in context: A039124 A335650 A056759 * A111747 A257594 A101545
KEYWORD
base,easy,nonn
AUTHOR
Eric Angelini, Jan 25 2005
STATUS
approved