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1,1
Analogous to A152396 with increments replacing decrements.
Table of n, a(n) for n=1..5.
278279 and 278279280281 are prime and no number <278 gives primes when treated similarly. Concatenation of 2, 4, 8, 10, and 14 numbers give primes beginning with 2645182700.
A152396
Sequence in context: A215043 A119553 A093938 * A231041 A080296 A182519
Adjacent sequences: A172371 A172372 A172373 * A172375 A172376 A172377
base,nonn
James G. Merickel, Feb 01 2010
approved