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 A202266 Composite numbers in which all substrings and reversal substrings are composites. 3
 4, 6, 8, 9, 44, 46, 48, 49, 64, 66, 68, 69, 84, 86, 88, 94, 96, 99, 444, 446, 448, 464, 466, 468, 469, 484, 486, 488, 494, 496, 644, 646, 648, 649, 664, 666, 668, 669, 684, 686, 688, 694, 696, 699, 844, 846, 848, 849, 864, 866, 868, 869, 884, 886, 888, 946, 948 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Subsequence of A202265, A202262. LINKS EXAMPLE All substrings and reversal substrings of 446 are composites: 4, 6, 44, 46, 64, 446, 644. CROSSREFS Cf. A202263 (primes in which all substrings and reversal substrings are primes),  A202264 (noncomposite numbers in which all substrings and reversal substrings are noncomposite), A202265 (nonprimes in which all substrings and reversal substrings are nonprimes). Sequence in context: A113591 A029581 A202262 * A232541 A076612 A182775 Adjacent sequences:  A202263 A202264 A202265 * A202267 A202268 A202269 KEYWORD nonn,base AUTHOR Jaroslav Krizek, Dec 25 2011 STATUS approved

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Last modified August 11 23:45 EDT 2020. Contains 336434 sequences. (Running on oeis4.)