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A091314
Primes in A038397 (concatenate first n squares in reverse order).
12
41, 941, 196169144121100816449362516941
OFFSET
1,1
COMMENTS
Among the first 51 terms only three terms are prime: SmBackConSq(2), SmBackConSq(3), SmBackConSq(14), found by Micha Fleuren.
The next term a(4) is formed from concatenation of square of numbers from 700 to 1 and consists of 3742 digits. - Shyam Sunder Gupta, Jul 25 2013
Analogously, a(5) is probably the concatenation of squares up to 2818^2, which is a probable prime of 18269 digits, while a(6) > 10^40000. - Giovanni Resta, Jul 22 2013
CROSSREFS
Cf. A038397.
Sequence in context: A177418 A038397 A104349 * A059762 A368809 A069362
KEYWORD
nonn,bref,base,less
AUTHOR
M. Grete (martha.grete(AT)web.de), Feb 21 2004
STATUS
approved