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 A248009 Partition of the positive odd integers into minimal blocks such that the concatenation of the numbers in each block is an evil number (A001969). Sequence lists the evil numbers obtained in this way. 4
 135, 7911, 131517, 19212325272931, 33, 35373941, 43, 45, 4749, 51, 53, 5557, 596163, 65, 676971, 737577, 798183, 85, 8789, 9193, 95, 9799101103105, 107109, 111, 113, 115117119, 121123125127129, 131133, 135, 137139, 141, 143145147, 149, 151153155157, 159 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS The numbers of the consecutive positive odd integers in the blocks of the partition are 3,3,3,7,1,4,1,1,2,1,1,2,3,1,3,3,3,1,2,2,... LINKS Peter J. C. Moses, Table of n, a(n) for n = 1..1000 EXAMPLE a(1)=135, since 1 and 13 are odious numbers, while 135 is evil. PROG (PARI) lista(nn) = {s = ""; forstep(n=1, nn, 2, ns = concat(s, Str(n)); if ((hammingweight(eval(ns)) % 2) == 0, print1(ns, ", "); s = "", s = ns); ); } \\ Michel Marcus, Oct 09 2014 CROSSREFS Cf. A248138, A248140, A248145, A248146, A248171, A248172. Sequence in context: A212608 A212611 A004005 * A143404 A051028 A076011 Adjacent sequences:  A248006 A248007 A248008 * A248010 A248011 A248012 KEYWORD nonn,base AUTHOR Vladimir Shevelev, Oct 05 2014 EXTENSIONS More terms from Peter J. C. Moses, Oct 09 2014 STATUS approved

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Last modified August 3 20:08 EDT 2020. Contains 336201 sequences. (Running on oeis4.)