OFFSET
1,1
COMMENTS
LINKS
Carlos Rivera, Puzzle 163. P+SOD(P)
EXAMPLE
11 begins the earliest chain 11, 13, 17 of three primes such that any term in the chain equals the previous term increased by the sum of its digits, viz., 13 = 11 + 2, 17 = 13 + 4. Hence a(3) = 11.
PROG
CROSSREFS
KEYWORD
base,more,nonn
AUTHOR
Joseph L. Pe, Jan 27 2004
EXTENSIONS
a(7)-a(8) from Donovan Johnson, Jan 08 2013
a(9) from Giovanni Resta, Jan 14 2013
STATUS
approved